Floor brush



Patented Dec. 22, 1925.

UNITED STATES PATENT OFFICE.

CARL C. GRAY, OF MINNEAEOLIS, MINNESOTA, ASSIGNOR, BY MESNE ASSIGNMENTS, 'lO GOPHER BRUSH GOMIANY, OF MINNEAPOLIS, llIINNESOTA, A CORPORATION OF MINNESOTA.

-FLOOR BRUSH.

Application filed. January 26, 1923. Serial No. 615,006.

To all whom it may concern. Be it known that I, CARL C. GRAY, a cit-1- zen of the United States, residing at Minne- I full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates particularly to what is generally designated as floor brushes or brush brooms, but the features of construction involved therein are capable of use generally in making brushes, and the term brush is herein used in a broad and liberal sense not only to include what isv more commonly designated as a brush but all other brushing devices such as those'indicated or others wherein the brush fibre or other brush materialis clamped to or within a receiving head or back.

The structure of the brush is such that it is especially well adaptedfor use of Tainpico, African bass, bassine and the like as the brush material, but, nevertheless, any other kind of usable brush or broom material may be employed.

The objects of the invention, other than those above indicated, may be briefly stated as strength, durability, cheapness of construction, and neatness of appearance.

Inthe accompanying drawings, which illustrate commercial forms of the invention, like characters indicate like parts throughout the several views.

Referring to the drawings:

Fig. 1 is a perspective showing the improved device designed as a floor brush;

Fig.2 is a side elevation of the brush shown in Fig. 1;

Fig. 3 is an inverted transverse section on the line 33 of Fig. 1, but on a larger scale;

Fig. 4 is a perspective illustrating the condition of the brush at one stage of the assemblage of the parts thereof;

Fig.. 5 is a fragmentary perspective showing the brush at a little later stage than in Fig. 4;

Fig. 6 is a section on the line 6-6 of Fig.

vise

ing one end of the clamping bar;

Fig. 7 is a fragmentary perspective show- Fig. 8 is a perspective showing designed as a brush broom;

Fig. 9 is a view partly in side elevation and partly in section, illustrating a some what modified construction and showing the brush head; and,

Fig. 10 is a fragmentary plan view of'the parts shown in Fig. 9.

Referring first to the construction illustrated in Figs. 1 to 7, inclusive, the numeral 13 indicates a quite thin stamped metal channel having upturned or closed ends and constituting what is herein designated as the brush head. In transverse cross section, the crown or top of this elongated channelshaped head 13 is approximately semi-circular, but the depending sides thereof are apthe brush proximately parallel for a considerable distance. In longitudinal section, the ends of said head have approximately the same cross section as the sides.

Fitted within the channel-shaped, head 13 is a clamping bar 14; preferably bent from a piece of thin sheet metal into approximately U-shaped form in cross-section, the side flanges thereof being approximately parallel but spaced apart a much less distance than the parallel sides of the head 13. This clamping bar 14 is placed with its back downward or outward and with its flanges projecting up into the head. At its ends, the clamping bar 1 1 is formed with bearing lugs or points 15 that are adapted to engage the ends of the head 13, but below said lugs,

. the flanges of said bars are cut away at 16 and thevtop of said bar is cut away to form quite deep notches at 17.

Nut-equipped bolts 18 are passed through perforations in the top of the head 13 and inthe back of the clamping bar 14:, and the nuts 19 of said bolts are screwed against said clamping bar.

The broom body is made up of a heavy layer of broom material 20 and end tufts 21. In assembling the parts of the brush, the channel-shaped back 13 may be conveniently clamped between the jaws of a vise 22, as shown' in Fig. 6, and a small amount of adhesive material 23, such as gilsonite or tar pitch, will be poured into the channel of said head. Then the end-forming tufts 21, at one end, are placed in the ends of the.

channel of the head and dipped into the adhesive material, as shown in Fig. t, and then, or immediately thereafter, the main body-forming fibre or material is placed in a heavy layer, crosswise of the head, projecting equi-distant on each side thereof, as shown in Figs. at, 5 and 6. The bolts 18 having already been placed in position, the clamping bar let is then placed in position, as shown in Fig. 6, and the nuts 19 are then screwed down, thereby causing the fibres 20 to double up and form the broom body shown best in Fig. 3, which latter View shows the brush as it appears after having been completed and just removed from the vise. When, by the tightening of the nuts, the clamping bar has been forced down into the channel of the head, the bent portions of the fibres 20 and the end tufts 21 will be forced down into the adhesive material and into the proper brush body-forming mass. It is im ortant to note that the parallel flanges of the clamping plate 1 1 are forced down well between the parallel sides of the head 13, so that the projecting broom material will be brought together into a coinpact mass. As the end tufts 21 are forced to position, some thereof will project through the passages formed by the cutaway or rounded ends 16 of the clamping bar, but most thereof will project up through the notches 17. lVith this arrangement, the end tufts are caught and held not only by the adhesive material but by a clamping action between the ends of the clamping bar and of the broom head.

W hen used as a floor brush, the head 13 will be provided with an oblique handle 241-. This handle 24, at one end, is secured in socket, which, as preferably designed, is made up of two semi-cylindrical sections 25 connected by small nut-equipped bolts 26 passed through said handle. The socket sections 25 are provided with overlapped extensions 27 and 28 that are bent to form a sort of a truss and to lit the rounded top of the head 13 to which they are rigidly but detachably clamped by nut-equipped bolts 29.

hen the brush is to be used as a brush broom, the type of handle-securing bracket is somewhat differently made so that the handle will be in-the plane of the brush. In the construction illustrated in Fig. 10, the handle 21- is secured in a two-part socket 330 by means of the bolts 26 and the sections of this socket are reversely bent and detachably secured to the head 13 by the nutequipped bolts 29. Y

The parallel walls of the head 13 and clamping bar 14: will themselves hold properly assembled brush material of short length, but when relatively longer brush material is used, the body of the brush may be bound together by stitches or fastening devices i'iassed through the same below the head. jriso, for long brush material, it will sometimes be advisable to use a retaining yoke or like structure applied to the head srd stantially as shown in Figs. 9 and 10, wherein the numeral 31 indicates a two-part wire yoke, the ends of which are clamped to the interior of the head 18 by nut-equipped bolts 18 that correspond to the heretofore des *ribed bolts 18. The head 13 is shown as provided with an integrally formed handle socket 32.

What I claim is:

1. A brush structure comprising a head in the form of a channel having closed rounded ends, said head being pressed from a single piece of material and without seams, a clamping bar working in the channel of said head, and brush material clamped in the channel of said head by said clamping bar, the said clamping bar being in the form of a channel having its flanges turned into the channel of said head, the ends of the flanges of the clamping bar being rounded and spaced from the rounded closed ends of the head.

2. A brush structure comprising a head in the form of a channel having closed ends, a clamping bar working in the channel of said head, and brush material clamped in the channel of said head by said clamping bar, the said clamping bar being in the form of a channel having its flanges turned into the channel of said head, the flanges of said head and clamping bar being parallel.

In testimony whereof I atlix my signature.

CARL C. GRAY. 

